#define F_CPU 16000000UL
#include <avr/io.h>
#include <avr/interrupt.h>

void uart_setup(void)
{
	UCSR0A=(1<<U2X0);
	UCSR0B=(1<<TXEN0);
	UCSR0C=(1<<UCSZ01)|(1<<UCSZ00);
	UBRR0=1;
}

void uart_write(unsigned char c)
{
	while(!(UCSR0A&(1<<UDRE0)));
	UDR0=c;
}

int main(void)
{
	unsigned char i;
	uart_setup();
	while(1)
	{
		unsigned char p=PINx;
		for(i=0; i<8; i++)
		{
			uart_write(p&128?:'1':'0');
			p<<=1;
		}
		uart_write('\n');
	}
	return(0);
}